NCP1587E

NCP1587E Low Voltage Synchronous Buck Controller The NCP1587E is a low cost PWM controller designed to operate from a 5 V or 12 V supply. This device is capable of producing an output voltage as low as 0.8 V. This 8−pin device provides an optimal level of integration to reduce size and cost of the power supply. The NCP1587E provides a 1 A gate driver design and an internally set 275 kHz oscillator. In addition to the 1 A gate drive capability, other efficiency enhancing features of the gate driver include adaptive non−overlap circuitry. The device also incorporates an externally compensated error amplifier and a capacitor programmable soft−start function. Protection features include programmable short circuit protection and under voltage lockout (UVLO). The NCP1587E comes in an 8−pin SOIC package. Features http://onsemi.com MARKING DIAGRAM 8 8 1 SOIC−8 D SUFFIX CASE 751 1 1587E= Specific Device Code A = Assembly Location L = Wafer Lot Y = Year W = Work Week G = Pb−Free Device 1587E ALYW G Input Voltage Range from 4.5 to 13.2 V 275 kHz Internal Oscillator Boost Pin Operates to 30 V Voltage Mode PWM Control 0.8 V ±1.0 % Internal Reference Voltage Adjustable Output Voltage Capacitor Programmable Soft−Start Internal 1 A Gate Drivers 80% Max Duty Cycle Input Under Voltage Lockout Programmable Current Limit This is a Pb−Free Device PIN CONNECTIONS BST 1 TG 2 GND 3 BG 4 (Top View) 8 PHASE 7 COMP/DIS 6 FB 5 VCC Applications Graphics Cards Deskto...